How to sign PDF with a smart card or USB token in C# through IAC ?

Question

Hi,
My goal is to apply a certification signature (MDP) to a PDF document with a smart card (Belgium identity card) from a C# application.
I start Acrobat through IAC.
The JavaScript object apparently can only sign with PKCS12 file (.pfx)...
To sign a PDF with a smart card I need to develop a plug-in if I am right?
The samples in the SDK are to get a certificate from the windows certificate store or to write a Third party handler.
I already get the certificate context (an HCRYPPROV object from windows certificate store)
How can I create a signature field but mostly sign it? With DigSig I guess, but I’m lost in the API… does
I have to use DigSigSignDoc ?
Syntax : void DigSigSignDoc(PDDoc pdDoc, CosObj sigField, ASAtom filterKey)
The filterKey value for the windows certificate store is “Adobe.PPKMS” but how can I choose my certificate?
I also have to build a signature reference dictionary i guess?
What does i have to do and in which order? I can't find any documentation on this.
There is a more simple way?
Thank you,
Goffin
Fabian

Answer 1

Hi,
-download the JDK sample "sdkAddSignature.js"
-change the sign methode like this :
Sign = app.trustedFunction (
    function( sigField, DigSigHandlerName )
   try {
   app.beginPriv();
   //the diSigHandler is "Adobe.PPKLite"
   var myEngine = security.getHandler(DigSigHandlerName);
   var ids = myEngine.digitalIDs;
   //choose an id which is installed in the microsoft store
  var oCert = ids.certs[3];
  // for (var i=0; i<ids.certs.length; i++)
  //  console.println("certificat n°"+ i + " " +ids.certs[i]);
  var oParams = {cPassword:"0000" , oEndUserSignCert:oCert }
  if(myEngine.login({cPassword:"0000",oParams:oParams,bUI:false}))
   console.println("OK");
  else
   console.println("Error");
  console.println("sigfield :" + sigField);
sigField.signatureSign({oSig: myEngine,oInfo: { password: "0000",reason: ACROSDK.sigReason,location: ACROSDK.sigLocation,contactInfo: ACROSDK.sigContactInfo}}); 
app.endPriv
   } catch (e) {
   console.println("An error occurred: " + e);
-perform some test using the javascript debugger
-and finally use IAC to execute the script